17-01-2016, 02:38 PM

Hello friends,

I try to use the new Funktion "fourier_an", "..._bn" or "..._cn" on CAS.

The function I try to approximate is a rectangle signal.

T=10ms

f(x)= 10V = û

a=0

n=1...6

In CAS: fourier_bn(Expr,Var,T,n,a)

so I type fourier_bn(10,x,10,1,0) for b1

Normally the result is:

b1=û*2/PI=20/PI

b2=0

b3=û*2/(3*PI)=20/(3*PI)

b4=0

b5=û*2/(5*PI)=20/(5*PI)

b6=0

a0=û/2=5

But with HP Prime calculator:

b1=b2=b3=b4=b5=b6=0

a0=10

The results are compleately wrong!!!

Is there a mistake in using the function on my side or is it an bug?

Thank you in advance for your help.

REF

I try to use the new Funktion "fourier_an", "..._bn" or "..._cn" on CAS.

The function I try to approximate is a rectangle signal.

T=10ms

f(x)= 10V = û

a=0

n=1...6

In CAS: fourier_bn(Expr,Var,T,n,a)

so I type fourier_bn(10,x,10,1,0) for b1

Normally the result is:

b1=û*2/PI=20/PI

b2=0

b3=û*2/(3*PI)=20/(3*PI)

b4=0

b5=û*2/(5*PI)=20/(5*PI)

b6=0

a0=û/2=5

But with HP Prime calculator:

b1=b2=b3=b4=b5=b6=0

a0=10

The results are compleately wrong!!!

Is there a mistake in using the function on my side or is it an bug?

Thank you in advance for your help.

REF